Why doesn't the LCD light up for a long time in rainy weather?

Early LCD used CCFL tube as backlight tube, which needed high-voltage lighting. If the high-voltage rod of the display and the CCFL tube head accumulate dust, ignite and carbonize, the leakage current will increase in humid weather, so that the CCFL tube cannot be lit due to insufficient high voltage. At this time, the monitor is working, and the screen looks normal from the side at close range, but there is no backlight. After a period of time, the display will be normal.

If you have electronic foundation and hands-on ability, you can buy a set of LED strip and constant current board yourself, and change the display screen into LED backlight, which will save electricity and have high brightness besides being affected by wet weather.